Cleaning my exhaust tips - please help

[Hamperman]

Hi, hopefully the picture has worked! I can't get these clean and shiny! I've tried Autosol and Britemax twins with fine wire wool. I've watched clips online that look worse than mine and come up shining like new so what am I doing wrong! Any advice greatly appreciated.
Cheers

[Hamperman]

Its stainless steel on a Cayman R so I don't think its possible to peel is it?

[Hamperman]

Tried WD40'but didn't really make any difference. Been using a couple of grades of wire wool. I loosened the exhaust tips off today so I could push them down to get better access but it still doesn't look great. I'm wondering if the 'Nano coating' has come off in parts although I'm not sure what that coating is!

[Hamperman]

It is stainless steel and not chrome.

[Hamperman]

Hi, it's definitely stainless steel - it's an OEM Porsche sports exhaust.

Is that wet and dry sandpaper you used? What was the roughest grade?

Cheers

[Hamperman]

Hi, access is ok as whilst I can't easily remove the tips I can undo the bolts and lower them which I have done, Don't have a dremel but do have a decent small cordless drill so like the ideal of the polishing attachments. Any advice as to what attachments I need and where best to get them from? Presumably somewhere will supply a pack of different pads?